PL202676B1 - Composition based no low-ethoxylated sorbitane ester for washing creatinic substances - Google Patents

Description

Description of the invention

The present invention relates to a composition for washing keratin substances, the use of fatty sorbitan ester, and a method for washing keratin substances. In particular, the invention relates to a hair and / or skin cleansing composition based on a low ethoxylated sorbitan fatty acid ester and a washing method using this composition.

It is known to use nonionic surfactants such as highly polyoxyethylene sorbitan esters in shampoos. Such sorbitan esters act as detergent auxiliaries in formulations of this type.

Belgian Patent No. 840667 (Johnson & Johnson) describes detergent compositions and shampoos based on combinations of nonionic surfactants, such as highly ethoxylated sorbitan esters, with low eye irritation and satisfactory foaming capacity. These sorbitan esters contain about forty ethylene oxide units, with the specially preferred compound containing 44 ethylene oxide units.

In this patent, detergent compositions are required to contain at least one polyoxyethylene derivative, a hydrophobic base, such as a nonionic surfactant, an anionic surfactant and a betaine surfactant. It is the combination of these three compounds that gives the composition a foam with good stability, not irritating the eyes.

Patent application EP 0815851A2 describes compositions, especially for shampoos, containing highly oxyethylene sorbitan esters with at least 20 ethylene oxide moieties in combination with anionic surfactants to reduce eye irritation in the presence of anionic surfactants.

Patent application EP 0815851A2 describes compositions, especially for shampoos, with a satisfactory softness and foaming capacity. These compositions contain surfactants of various types, i.e. they contain at least one nonionic surfactant in combination with at least one anionic surfactant and an amphoteric surfactant. In particular, the compositions contain sorbitan esters such as polysorbate 20 and polysorbate 80 containing approximately 20 moles of ethylene oxide.

It is known to use sorbitan esters as a sudsing additive, e.g., to make a bar soap as disclosed in US 3,988,255, and to prepare the shaving compositions disclosed in US 3,819,524 and US 5,482,705. The use of sorbitan esters for the preparation of a shower gel is known from US 4,772,427 and for the preparation of an aqueous foaming composition is known from FR 2 753 373.

The known compositions show the trait that they are difficult to thicken, which leads to an average performance quality: poor spreading of the product, difficult emulsification, heavy-to-touch feeling.

According to the invention, the composition for washing keratin substances is characterized in that it comprises, in a cosmetically acceptable aqueous medium, at least one anionic detergent surfactant, in an amount of 5-50% by weight, based on the total weight of the composition, and at least one ethoxylated Sorbitan ester and a C8-C30 fatty acid, saturated or unsaturated, straight chain or branched, with a mole number of ethylene oxide equal to or less than 10, with an anionic detergent surfactant / sorbitan ester weight ratio of 0.5-5.

Preferably, the composition comprises at least one ethoxylated sorbitan ester of a C8-C20 fatty acid, with a mole number of ethylene oxide equal to or less than 10.

Preferably, the ethoxylated sorbitan ester contains 3-8 moles of ethylene oxide.

Preferably, the sorbitan ester is a sorbitan monoester.

Preferably, the sorbitan ester is selected from ethoxylated sorbitan monolaurate (4 OE), ethoxylated sorbitan monostearate (4 OE) and ethoxylated sorbitan monooleate (5 OE).

Preferably, the sorbitan ester is present in an amount of 0.5-20%, especially 2-15% by weight of said composition.

Preferably, the composition further comprises a detergent surfactant selected from nonionic surfactants other than oxyethylene sorbitan C8-C30 fatty acid esters, with a mole number of ethylene oxide equal to or less than 10, amphoteric or zwitterionic surfactants.

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Preferably, detergent surfactants are present in an amount of 1-50 wt% based on the total weight of the composition, preferably 5-40 wt%.

Preferably, the composition additionally comprises one or more cationic surfactants.

Preferably, the composition additionally comprises one or more silicones.

Preferably, the composition additionally comprises one or more cationic or amphoteric polymers.

Preferably the composition comprises at least one cationic polymer selected from quaternary cellulose ether derivatives, polysaccharides, in particular cationic guar gums and methyldiallylammonium or dimethyldiallylammonium cyclopolymers.

Preferably, the composition additionally comprises viscosity regulators such as electrolytes, in particular sodium chloride, thickeners such as cellulose derivatives, guar gum, hydroxypropylated guar gums, scleroglucans, xanthan gum and amphiphilic polymers containing at least one fatty chain.

Preferably, the composition additionally comprises one or more adjuvants selected from perfumes, preservatives, foam synergists, masking agents, foam stabilizers, extrusion agents, dyes, anti-dandruff agents, ceramides, vitamins or provitamins, hydroxy acids, acidifying or alkalizing agents, vegetable oils, mineral, animal, synthetic oils such as polyisobutenes and polydecenes, fatty acid esters, pseudoceramides and pearlescent agents.

The invention also relates to the use of at least one C8-C30 fatty acid ester of sorbitan with a mole number of ethylene oxide equal to or less than 10 for reducing eye irritation potential and improving the thickening of keratin washing compositions containing a detergent surfactant, especially for shampoo.

According to the invention, the method of washing keratin substances is characterized in that at least one composition as defined above is applied to the substances, followed by rinsing of the treated substances after an optional period of interruption.

It has surprisingly been found that the addition of a low ethoxylated sorbitan ester with a mole number of ethylene oxide equal to or less than 10 reduces the irritating nature (especially to the eyes) of keratin washing compositions containing detergent surfactants such as anionic surfactants, in particular alkyl sulfates and alkyl ether sulfates, which may be irritating when used alone.

In particular, good results have been obtained with an anionic detergent surfactant / sorbitan ester weight ratio of 0.5-5.

The keratin cleansing compositions of the invention contain simultaneously at least one anionic detergent surfactant and at least one sorbitan ester of a C8-C30, preferably C8-C20, saturated or unsaturated, linear or branched fatty acid, with an anionic detergent weight ratio. surfactant / sorbitan ester of a C8-C30 fatty acid of 0.5-5.

Recommended sorbitan esters are oxyethylene sorbitan monolaurate (4 OE) or polysorbate 21, oxyethylene sorbitan monostearate (4 OE) or polysorbate 61, oxyethylene sorbitan monooleate (5 OE) or polysorbate 81.

Among the anionic surfactants, mention may be made of alkali salts, ammonium salts, amine salts, amino alcohols, magnesium salts of the following compounds: alkyl sulfates, alkyl ether sulfates, alkyl amide ether sulfates, alkyl aryl polyether sulfates, monoglycerides sulfates, alkyl sulfonates, alkylsylsulfin sulfonates, alkylsulfonatesulfonates, alkylsulfin sulfonates , alkylsulfosuccinamates, alkylsulfoacetates, alkylphosphates and alkyletherphosphates, acylsarcosinates, acylisothionates and N-acyltaurates. Among the anionic surfactants, mention may also be made of fatty acid salts such as oleic, ricinoleic, palmitic, stearic, coconut oil or hydrogenated coconut oil acids, acyllactates. The acyl or alkyl groups generally contain 8-30 carbon atoms.

Surfactants such as polyoxyalkylenated alkyl or alkylaryl ether carboxylic acids or their salts, polyoxyalkylenated alkylamido ether carboxylic acids or their salts, alkyl D-galactosiduronic acids or their salts can also be used.

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The anionic surfactant is preferably used in amounts of 1-50 wt%, more particularly 5-40 wt%, based on the total weight of the composition.

The composition according to the invention is preferably soap free.

The composition of the present invention may further contain one or more detergents selected from nonionic surfactants other than the low ethoxylated sorbitan esters defined above, amphoteric or zwitterionic surfactants in amounts sufficient to impart detergent properties to the composition.

Additional nonionic surfactants are more particularly selected from alcohols or alkylphenols or polyethoxylated, polypropoxylated or polyglycerolated fatty acids with a fatty chain containing 8-18 carbon atoms, the number of ethylene oxide or propylene oxide groups being 2-50 and the number of glycerol groups being 2 -30, except for ethoxylated sorbitan C8-C30 fatty acid esters with moles of ethylene oxide equal to or lower than 10.

Mention may also be made of copolymers of ethylene and propylene oxide, condensates of ethylene and propylene oxide with fatty alcohols, polyethoxylated fatty amides, preferably having 2-30 moles of ethylene oxide, polyglyceroled fatty amides containing preferably 1-5 glycerol groups, and in particular 1.5-4, polyethoxylated fatty amines, preferably having 2-30 moles of ethylene oxide, ethoxylated sorbitan fatty acid esters, having 12-30 moles of ethylene oxide, sucrose fatty acid esters, polyethylene glycol fatty acid esters, alkyl polyglycosides, carbamate or amide derivatives of N-alkylglucamines , aldobionamides, amine oxides such as alkylamine oxides or N-acylaminopropylmorpholine.

Preferred amphoteric surfactants are derivatives of aliphatic secondary or tertiary amines in which the aliphatic group is a straight or branched chain containing 8-22 carbon atoms and contains at least one anionic water-solubilizing group such as carboxylate, sulfonate, sulfate, phosphate. or phosphonate; alkyl (C8-C20) betaines, sulfobetaines, alkyl (C8-C20) amidoalkyl (C1-C6) betaines or alkyl (C8-C20) amidoalkyl (C1-C6) sulfobetaines.

Among the amine derivatives, mention may be made of the products sold under the name Miranol, as described in US-A-2,528,378 and 2,781,354 and classified in the CTFA dictionary, 7th edition, 1997, under the names Disodium Cocoamphodiacetate, Disodium Lauroamphodiacetate, Disodium Capryloamphodiacetate. , Disodium Caproamphodiacetate, Disodium Cocoamphodipropionate, Disodium Lauroamphodipropionate, Disodium Caproamphodipropionate, Disodium Capryloamphodipropionate, Lauroamphodipropionic acid, Cocoamphodipropionic acid.

Detergent surfactants are present in amounts generally of 1-50 wt.% Based on the total weight of the composition, and preferably 5-40 wt.%.

According to a preferred embodiment, the compositions according to the invention contain at least one anionic surfactant, at least one low ethoxylated sorbitan ester and at least one amphoteric surfactant.

The compositions may also contain cationic surfactants, preferably used in amounts of 0.001-5% by weight based on the total weight of the composition.

The cationic surfactants are especially selected from the salts of primary, secondary or tertiary fatty amines, optionally polyoxyalkylenated, quaternary ammonium salts, imidazoline derivatives or amine oxides of cationic nature.

Preferred quaternary ammonium salts are tetraalkylammonium halides (e.g. chlorides), such as e.g. dialkyldimethylammonium or alkyltrimethylammonium chlorides in which the alkyl group contains about 12-22 carbon atoms, in particular behenylotrimethylammonium chloride, distearyldimethylammonium, cetimethyltrimethyl ammonium or stearyl trimethyl ammonium chloride. marketed under the name "Ceraphyl 70" by the Van Dyk company.

It is also possible to use diacyloxyethyldimethylammonium, diacyloxyethylhydroxyethylmethylammonium, monoacyloxyethyldihydroxyethylmethylammonium, triacyloxyethylmethylammonium, monoacyloxyethylhydroxyethyldimethylammonium salts (especially chlorides or methylsulfates).

The acyl groups are especially derived from a vegetable oil such as palm or sunflower oil.

PL 202 676 B1

The concentration of additional surfactants, other than anionic surfactants, may vary from 0 to 30%, preferably from 0.5 to 15% by weight based on the total weight of the composition.

The compositions according to the invention may also contain silicones, namely polyorganosiloxane oils or gums or polyorganosiloxane resins, in the form of solutions in organic solvents or also in the form of emulsions or microemulsions.

Among the polyorganosiloxanes that may be used in accordance with the present invention, the following may be mentioned without limiting the scope:

- volatile silicones: they have a boiling point of 60-260 ° C. They are selected from cyclic silicones containing 3-7 silicon atoms, preferably 4-5;

- non-volatile silicones: they are mainly polyalkylsiloxanes, polyarylsiloxanes, polyalkylarylsiloxanes, silicone rubbers, silicone resins or their mixtures, and silicones modified with organic groups.

More particularly, polydimethylsiloxanes, aminated silicones and alkoxylated silicones are used.

The polyorganosiloxanes may be used in the compositions according to the invention in amounts of 0.01-20% by weight, preferably 0.1-10% by weight, based on the total weight of the composition.

The compositions of the invention may also contain a cationic or amphoteric polymer.

The cationic polymers used generally have a numerical molecular weight of from 500 to about 5.10 ⁶ and preferably from 10 ³ to about 3.10 ⁶ .

Among the cationic polymers, mention may be made of quaternary proteins (or protein hydrolysates) and polymers of the polyamine, polyaminoamide and quaternary polyammonium types. These are known products.

Quaternary proteins or protein hydrolysates are in particular chemically modified polypeptides with or grafted on to quaternary ammonium groups at the end of the chain. Their molecular weight may vary, for example, from 1,500 to 10,000, and in particular from 2,000 to about 5,000.

Polymers of the polyamines, polyamidoamides, polyquaternary ammonium types which can be used in accordance with the present invention, which may be mentioned in particular, are described in French Patent Nos. 2,505,348 or 2,542,997. Among these polymers can be mentioned:

1) Vinylpyrrolidone / acrylate or dialkylaminoalkyl methacrylate copolymers, quaternized or not, such as the polymers specifically described in French patents 2,077,143 and 2,393,573;

2) Cellulose ether derivatives including quaternary ammonium groups as described in French Patent 1,492,597;

3) Cationic cellulose derivatives, such as cellulose copolymers or cellulose derivatives grafted with a water-soluble quaternary ammonium monomer and described in particular in US Patent 4,131,576, such as hydroxyalkyl celluloses, in particular hydroxymethyl, hydroxyethyl or hydroxypropyl celluloses grafted, especially with salt methacryloylethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dimethyldiallylammonium;

4) Polysaccharides and especially cationic guar gums as more particularly described in US Pat. Nos. 3,589,578 and 4,031,307;

5) Straight or branched chain polymers formed from piperazinyl groups and divalent alkylene or hydroxyalkylene groups, optionally interrupted by oxygen, sulfur, nitrogen or aromatic or heterocyclic rings, as well as oxidation and / or quaternization products of these polymers. Such polymers are described in particular in French patents 2 162 025 and 2 280 361;

6) Water-soluble polyaminoamides, especially prepared by polycondensation of an acid compound with a polyamine; these polyamino amides can be crosslinked with an epihalohydrin, a diepoxide, a dianhydride, an unsaturated dianhydride, a bis-unsaturated, halohydrin, bisazetydyną, a bis, alkyl halide or alternatively with an oligomer resulting from the reaction of a difunctional compound which is reactive with a bis-halohydrin, bisazetydyną, a bis, alkyl halide, an epihalohydrin, a diepoxide or a bis-unsaturated derivative, the crosslinker being used in an amount of 0.025-0.35 mol per amino group of the polyaminoamide; these polyaminoamides can be alkylated or also quaternized if they contain one or more tertiary amine functions. Such polymers are described in particular in French patents 2,252,840 and 2,368,508;

7) Polyaminoamide derivatives resulting from the condensation of polyalkylene polyamines with polycarboxylic acids and subsequent alkylation with bifunctional agents. For example, acid polymers can be mentioned

The adipic / dialkylaminohydroxyalkyldialkylene triamine in which the alkyl group contains 1-4 carbon atoms and is preferably methyl, ethyl, propyl. Such polymers are described in particular in French Patent Specification No. 1,583,363;

8) Polymers obtained by reacting a polyalkylene polyamine containing two primary amine groups and at least one secondary amine group with a dicarboxylic acid selected from diglycolic acid and aliphatic saturated dicarboxylic acids having 3-8 carbon atoms, the molar ratio of the polyalkylene polyamine and the dicarboxylic acid from 0.8: 1 to 1.4: 1; the resulting polyaminoamide is reacted with epichlorohydrin in a molar ratio of epichlorohydrin to the secondary amine group of the polyaminoamide ranging from 0.5: 1 to 1.8: 1. Such polymers are described in particular in US Pat. Nos. 3,227,615 and 2,961,347;

9) Methyl diallylamine or dimethyldiallylammonium cyclopolymers, especially those described in French patent 2 080 759 and its additional certificate 2 190 406;

10) Quaternary diammonium polymers described in French patents 2,320,330, 2,270,846, 2,316,271, 2,336,434 and 2,413,907 and US patents 2,273,780, 2,375,853, 2,388,614, 2,454,547, 3 206 462, 2 261 002, 2 271 378, 3 874 870, 4 001 432, 3 929 990, 3 966 904, 4 005 193, 4 025 617, 4 025 627, 4 025 653, 4 026 945 and 4 027 020 ;

11) Quaternary polyammonium polymers described in particular in EPA-122,324;

12) Homopolymers or copolymers derived from acrylic or methacrylic acid and containing moieties

CH2-CHRa-CO-O-A1-NReRf,

CH2-CHRa-CO-O-Ar1N ⁺ RbRcRd'X ^- and / or

CH2-CHRa-CO-NH-A1-N ⁺ RbRcR d'X ^- in which the Ra groups are independently H or CH3, the A1 groups are independently a linear or branched alkyl group with 1-6 carbon atoms, or a hydroxyalkyl group with 1-4 carbon atoms, groups Rb, Rc, Rd, which may be identical or different, independently represent an alkyl group of 1-18 carbon atoms or a benzyl group, the groups Re and Rf represent a hydrogen atom or an alkyl group of 1-6 carbon atoms, X ^- is an anion, e.g. a methyl sulfate or a halide such as chloride or bromide;

13) Quaternary polymers of vinylpyrrolidone and vinylimidazole such as the products sold under the names "Luviquat FC 905", "Luviquat FC 550" and "Luviquat FC 370" by BASF;

14) Polyamines, such as "Polyquart H" marketed by Henkel, listed in the CTFA dictionary under the name "Polyethyleneglycol Tallow Polyamine";

15) Crosslinked polymers of methacryloyloxyethyltrimethylammonium salt, such as those obtained by homopolymerization of dimethylaminoethyl methacrylate quaternized with methyl chloride or by copolymerization of acrylamide with dimethylaminoethylmethacrylate quaternised with methyl chloride or by copolymerization with methyl chloride quaternized or copolymerization by homopolymerization with methylene chloride. A cross-linked acrylamide / methacryloyloxyethyltrimethylammonium chloride copolymer (20/80 by weight) in the form of a dispersion containing 50% by weight of the said copolymer in mineral oil can be used more particularly.

Other cationic polymers that can be used in the context of the invention are polyalkylenimines, in particular polyethyleneimines, polymers containing vinylpyridine or vinylpyridinium moieties, polyamine and epichlorohydrin condensates, quaternary polyureilenes and chitin derivatives.

Among all the cationic polymers that can be used in the context of the present invention, cellulose ether derivatives containing quaternary ammonium groups, polysaccharides, and in particular cationic guar gums and methyldiallylammonium or dimethyldiallylammonium cyclopolymers are preferred.

The cationic polymers are used in the compositions of the invention in amounts of 0.001-20% by weight, preferably 0.005-5% by weight, based on the total weight of the composition.

The compositions according to the invention have a pH of generally 3-12, in particular 4-8.

The cosmetically acceptable composition medium is made up of either water or one or more solvents, or a mixture of water and at least one solvent selected from lower alcohols, alkylene glycols and polyol ethers.

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The compositions according to the invention may also contain viscosity regulators, such as electrolytes, in particular sodium chloride, thickeners, such as cellulose derivatives, e.g. carboxymethyl cellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, guar gum, hydroxypropylated guar gums, scleroglucans, xanthan gum, polymers containing at least one amphiphophyll fatty chain.

The compositions according to the invention may also contain various adjuvants commonly used in cosmetics, such as fragrances, preservatives, foam synergists, masking agents, foam stabilizers, extrusion agents, dyes, anti-dandruff agents, ceramides, vitamins or provitamins, hydroxy acids, acidifying or alkalizing agents. , vegetable, mineral, animal oils, synthetic oils, such as polyisobutenes and polydecenes, fatty acid esters, pseudoceramides, pearlescent agents or other adjuvants, depending on the intended use.

The invention also relates to the use in a shampoo of at least one sorbitan ester of a C8-C30 fatty acid as defined above.

The examples which follow are intended to illustrate the invention and are not intended to be limiting in nature.

P r z k ł a d I

The following composition was made:

Sodium lauryl ether sulphate (C12 / C14 in the ratio 70/30) with 2.2 moles of ethylene oxide 7.0 g M.A.

Coocoylamidopropylbetaine in an aqueous solution of 38% M.A. 3.8 g of M.A.

Sorbitan monostearate ethoxylated with 4 moles of ethylene oxide, sold under the name "Tween 61" by the company Uniquema 6.0 g

Lauryl alcohol ethoxylated with 2.5 moles of ethylene oxide 1.0 g

Hydroxyethyl cellulose cross-linked with epichlorohydrin and quaternary trimethylamine, sold under the name "JR 400" by Union Carbide 0.2 g

Preservatives q.s.

Demineralized water q.s.ad 100.0 g P r z o l a d II

The following composition was made:

Sodium lauryl ether sulphate (C12 / C14 in the ratio 70/30) with 2.2 moles of ethylene oxide 8.4 g M.A.

Lauryl alcohol monosulfosuccinate with 3 moles of ethylene oxide, disodium salt in an aqueous solution of 30% M.A. 2.6 g M.A.

Sorbitan monooleate ethoxylated with 5 moles of ethylene oxide, sold under the name "Tween 81" by the company Uniquema 5.0 g

Polyethylene glycol dioleate (55 moles of ethylene oxide) and propylene glycol in a water-glycol solution, sold under the name "Antil 141 Liquid" by Goldschmidt 5.0 g

Hydroxypropylguarotrimethylammonium chloride, sold under the name "Jaguar C 162" by the Rhodia company 0.05 g

Sodium hydroxide q.s.ad pH 7.0

Preservatives q.s.

Demineralized water q.s.ad 100.0 g

P r z x l a d III

The following composition was made:

Sodium lauryl ether sulphate (C12 / C14 in the ratio 70/30) with 2.2 moles of ethylene oxide 11.8 g M.A.

Coocoylamidopropylbetaine in an aqueous solution of 38% M.A. 1.8 g of M.A.

1- (hexadecyloxy) -2-octadecanol / cetyl alcohol mixture 2.5 g

Sodium cetostearyl sulfate 0.8 g

Sorbitan monolaurate ethoxylated with 4 moles of ethylene oxide, sold under the name "Tween 21" by the company Uniquema 8.0 g

Polydimethylsiloxane sold under the name Mirasil DM 500,000 by the company Rhodia Chimie 1.5 g

Hydroxyethyl cellulose cross-linked with epichlorohydrin and quaternary trimethylamine, sold under the name "JR 400" by Union Carbide 0.4 g

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Cross-linked polyacrylic acid, sold under the name Carbopol 980

by Goodrich 0.2 g Sodium hydroxide q.s.ad pH 6.5 Preservatives, fragrance q.s. Demineralized water q.s.ad 100.0 g

P r e c t a n d e s

The following compositions were prepared:

Example 4A (according to the invention): A composition containing, as a nonionic surfactant, a low ethoxylated sorbitan ester such as Tween 21 (4 moles of ethylene oxide).

Example 4B: A composition comprising, as a nonionic surfactant, a highly ethoxylated sorbitan ester such as Tween 20 (20 moles of ethylene oxide).

Thickening shampoo formulations is much more convenient when replacing a highly ethoxylated sorbitan ester like Tween 20 (20 moles of ethylene oxide) conventionally used in baby shampoos with a non-ethoxylated compound such as Tween 21 (4 moles of ethylene oxide);

the resulting shampoo also has an excellent level of eye tolerance.

Example 4A (according to the invention)

Sodium lauryl ether sulfate (C12 / C14 in the ratio 70/30) with 2.2 moles of ethylene oxide 7.0 g M.A.

Sodium cocoylamphohydroxypropyl sulfonate in 32% aqueous solution, sold under the name "Miranol CSE" by the Rhodia company 12.0 g

Sorbitan monolaurate ethoxylated with 4 moles of ethylene oxide, sold under the name "Tween 21" by the company Uniquema 8.0 g

Sorbitan monolaurate ethoxylated with 20 moles of ethylene oxide, sold under the name "Tween 20" by the company Uniquema Hydroxyethyl cellulose cross-linked with epichlorohydrin and quaternary trimethylamine, sold under the name "JR 400" by the company Union Carbide 0.25 g

Citric acid q.s.ad pH 7.0

Preservatives q.s.

Demineralized water q.s.ad 100.0 g

Example 4B

Sodium lauryl ether sulphate (C12 / C14 in the ratio 70/30) with 2.2 moles of ethylene oxide 7.0 g M.A. Sodium cocoylamphohydroxypropyl sulfonate in 32% aqueous solution, sold under the name "Miranol CSE" by the Rhodia company 12.0 g

Sorbitan monolaurate ethoxylated with 4 moles of ethylene oxide, sold under the name "Tween 21" by the company Uniquema Sorbitan monolaurate ethoxylated with 20 moles of ethylene oxide, sold under the name "Tween 20" by the company Uniquema 8.0 g

Hydroxyethyl cellulose cross-linked with epichlorohydrin and quaternary trimethylamine, sold under the name "JR 400" by Union Carbide 0.25 g

Citric acid q.s.ad pH 7.0

Preservatives q.s.

Demineralized water q.s.ad 100.0 g

Viscosity measurements were made with a Haake VT550 viscometer equipped with a cylindrical moving element MV B Din at 25 ° C.

The graph in the accompanying drawing shows that the viscosity of a formulation according to the invention (Example 4A) which contains "Tween 21" is significantly higher than that of a formulation containing "Tween 20 which is completely fluid (Example 4B).

Claims (17)

Patent claims A composition for washing keratin substances, characterized in that it comprises, in a cosmetically acceptable aqueous medium, at least one anionic detergent surfactant, in an amount of 5-50% by weight based on the total weight of the composition, and at least one oxyethylene sorbitan ester and C8-C30 fatty acid, saturated or unsaturated, A linear or branched chain with a mole number of ethylene oxide equal to or less than 10, with an anionic detergent surfactant / sorbitan ester weight ratio of 0.5-5. 2. A composition according to claim 1 The method of claim 1, wherein the ethoxylated sorbitan C8-C20 fatty acid ester has a mole number of ethylene oxide equal to or less than 10. 3. A composition according to p. The method of claim 1 or 2, characterized in that the ethoxylated sorbitan ester contains 3-8 moles of ethylene oxide. 4. A composition according to any one of claims 1 to 4; The method according to claim 1, wherein the sorbitan ester is a sorbitan monoester. 5. A composition according to any one of claims 1 to 5; A process according to any of the claims 1-4, characterized in that the sorbitan ester is selected from ethoxylated sorbitan monolaurate (4 OE), ethoxylated sorbitan monostearate (4 OE) and ethoxylated sorbitan monooleate (5 OE). 6. A composition according to any one of claims 1 to 6; 1-5, characterized in that the sorbitan ester is present in an amount of 0.5-20%, preferably 2-15% by weight of said composition. 7. A composition according to any one of claims 1 to 7; A detergent surfactant selected from non-ionic surfactants different from oxyethylene sorbitan esters of C8-C30 fatty acid, with a mole number of ethylene oxide equal to or less than 10, amphoteric surfactants or hermaphroditic. 8. A composition according to any one of claims 1 to 5; The method according to any of the claims 1-7, characterized in that the detergent surfactants are present in an amount of 1-50% by weight of the total weight of the composition, preferably 5-40% by weight. 9. A composition according to any one of Claims A composition according to any of the claims 1-8, characterized in that it further comprises one or more cationic surfactants. Composition according to any one of claims 1 to 10 A composition according to any of the claims 1-9, characterized in that it further comprises one or more silicones. 11. A composition according to any one of claims 1 to 11; A polymeric composition according to any of the preceding claims, further comprising one or more cationic or amphoteric polymers. 12. A composition as claimed in p. The process of claim 11, characterized in that it comprises at least one cationic polymer selected from quaternary cellulose ether derivatives, polysaccharides, in particular cationic guar gums and methyldiallylammonium or dimethyldiallylammonium cyclopolymers. 13. A composition according to any one of claims 1 to 13 1-12, characterized in that it also contains viscosity regulators, such as electrolytes, in particular sodium chloride, thickeners such as cellulose derivatives, guar gum, hydroxypropylated guar gums, scleroglucans, xanthan gum and amphiphilic polymers containing at least one fatty chain . 14. A composition as claimed in any one of claims 1 to 14, Characterized in that it further comprises one or more adjuvants selected from perfumes, preservatives, foam synergists, masking agents, foam stabilizers, extrusion agents, dyes, anti-dandruff agents, ceramides, vitamins or provitamins, hydroxy acids, acidifying agents or alkalizing oils, vegetable, mineral, animal oils, synthetic oils such as polyisobutenes and polydecenes, fatty acid esters, pseudoceramides and pearlescent agents. 15. Use of at least one C8-C30 fatty acid ester of sorbitan with a mole number of ethylene oxide equal to or less than 10 to reduce eye irritation potential and to improve the thickening of keratin washing compositions containing a detergent surfactant. 16. Use according to claim 1 15 for shampoo. 17. A method of washing keratinous substances, characterized by applying to the substances at least one composition as defined in any one of the preceding claims. 1-14, followed by rinsing of the treated substances after an optional period of interruption.